On Tuesday 26 April 2011 11:52:27 Bartosz Fabianowski wrote: > 1. attach() is running and executes make_dev(). Before attach() has > finished, someone calls open() on the newly created device node and > tries to read from a device that is not fully instantiated. > > 2. read() is running when the device is suddenly pulled (this is a USB > device) so that detach() gets run. Thus, detach() starts tearing down > data structures that read() may still be accessing.
Hi, You need to handle all cases in your driver. Fortunately there exists a solution for this already, called USB cdev. See serial/ulpt.c for example. --HPS _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"
